Pump for wells.



W. H. LARKIN.

FUMP FOR WELLS. APPLICATION FILED JUNE 4, 1908.

Patented NOV; 2, 1909.

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WILLIAM H. LARKIN, 0F BUTLER, PENNSYLVANIA.

PUMP FOR WELLS.

Specification of Letters Patent.

Patented 'Nov. 2,, 1909.

Application filed June 4, 1908. Serial No. 436,615.

T 0 all whom it may concern:

Be it known that 1, WILLIAM H. LARKIN,

a resident of Butler, in the county of Butler and State of Pennsylvania, have invented a.

new and useful Improvement in Pumps for Wells; and I do hereby declare the following to be a full, clear, and exact descrlption thereof. a

My invention relates to sand pumps, or bailers, as they are sometimes termed, such as are employed in connection with the dr1lling of oil and like wells.

The invention relates more particularly tothat class of pump or bailer in which a long tube or cylinder is employed with a piston therein for creating the suction, and which is provided at the bottom with a removable member containing a valve and valve seat, said member being releasably connected with the cylinder so that it may be readily detached from the cylinder to allow for the discharge of the contents of the pump when raised to the top of the well without the necessity of inverting the pump to discharge the sand, gravel and sediment contained therein.

The object of my present invention is to provide a pump of this character free from shoulders or proj ections at the point where the collar is secured to the pump cylinder, all the parts being flush with the barrel of the ump so that there are no projecting parts for the rock or sand to lodge on, and prevent the easy withdrawal of the pump from the well.

To these ends my invention comprises the novel features hereinafter set forth and claimed.

Referring to the drawings Figure l is a side elevation of my improved pump; Fig. 2 is a vertical section thereof; Fig. 3 is an enlarged sectional view of the lower end of the pump; and Fig. 4 is a perspective view of the collar removed.

The cylinder or barrel 2 which contains the pump mechanism may be of any desired length and this length may be increased over that of the ordinary sand pump as it is not necessary to invert the cylinder in my pump after the same has been filled with water and sediment taken from the well, such pumps having been made of different lengths from 25 to lO'feet. At the lower end of the pump barrel 2 is the sleeve or collar 3 which is preferably shrunk within the cylinder, the

neck 4 of said collar projecting up into the barrel and said collar being flush with the outer walls of said barrel. Formed within the collar 3 are the bayonet slots 5 arranged at suitable intervals around said-collar. A. ring member 6 is provided withthe studs 7 which are adapted to engage the bayonet slots 5. This ring 6 is provided with the legs 8 with the intervening openings 9 to permit of the entrance of the sand and water to the lower end of the'pump. Hinged to the ring 6 is the clack valve 10, said valve opening upwardly, as indicated. This valve consists of the body portion 11 formed of leather which also forms the hinge and said valve is reinforced by the metal plate 12 and riveted thereto.

A latch 13 is pivoted to one of the'legs 8, said leg being cut away as indicated to provide for said latch and the spring 14 is also secured to said leg, and said spring is adapted to bear against said latch. This latch 13 is adapted to enter one of the bayonet slots 5 and when in engagement with said slot said latch acts to lock the ring 6 securely in position and prevent its accidentally slipping from the bayonet joint when. lowered into the well or being Withdrawn therefrom. This latch when in engagement with the bayonet slot. fits down within said slot so as to be flush with the outer face of the ring (3 and at the same time flush with the pump barrel, so that said lock presents no projection of any kind and is not liable to engage with the sides of the well in withdrawing or lowering the pump, nor is it liable to get caught in the rock or sand which may surround the 'pump when lowered into the well. Furthermore, the spring 13 is in such position that it does not project in any way beyond the outer surface of the pump barreland is conseguently not liable to injury when the pump is muse. V

It is readily apparent that when the pump is lowered into the well with the ring 6 locked in position, the pump can be lowered without danger "of any of the. parts strikring 6 ma be turnedto disengage its studs from the ayonet slots of the pump barrel and the ring may be removed, together. with the valve 10, so that the contents of the pump may ,wbe discharged from the lower end of the pump barrel.

In connectionvvith my invention 1 have illustrated a pump piston similar to that illustrated and described in Letters Patent of the United StatesYNo. 563,055 granted June 30, 1896, to George Palm. However,

any suitable pump piston may be employed for creating the suction to draw in the sand and Water.

What I claim is:

.1. In a sand pump, the combination of a cylindrical shell, a ring member forming a valve seat connected to said shell by a bayo-' net joint a'ndhaving a recessed portion, a valve carried .by sald ring, and a locking member on said ring in said recessed portion adapted to engage the bayonet slot on said shell. v

- 2. In a sand pump, the combination of a cylindrical shell, a ring member forming a valveseatconnected to said shell by a bayonet joint and having a recessed portion, a

valvecarried by sald ring, and a 'sprin actuated latch on said ring in said recesse valve seat adapted to enter said shell, a stud on said ring engaging a bayonet slot in said shell, legs on said ring, and a latch carried I by one of said legs and adapted to engage said bayonet slot.

5. In a sand pump, the combination of a cylindrical shel a ring member forming a valve seat' adapted to enter said shell, a stud on said ring engaging a bayonet slot in said shell, legs on said ring, and a latch pivoted to one of said legs and adapted to engage said bayonet joint. i

6. In a sand pump,'the combination of a cylindrical shell, a ring member forming a valve seat adapted to'enter said shell, a stud on said ring engaging a bayonet slot in said shell, legs on said ring, and a latch pivoted to one of said legs and adaptedto engage said bayonet joint, and a spring carv ried by said leg engaging said latch.

In testimony whereof, I the said WILLIAM H. LARKIN have hereunto set my hand.

WILLIAM H. LARKIN. Witnesses:

ROBERT C. TOTTEN, JOHN F. WILL. 

